I think you'll find that you're not comparig like with like: the first wind-farms were in relatively shallow waters, and firms are now going further afield. This would naturally add to the real-terms cost, but not because te tech itself has got more expensive.

Gwynt y Mawr is also a shallow water site. But rather than some tiresome spat as to whether or not it's shallow or not, as another example, which is certainly shallow water, we have Rhyl Flats, just along the road from North Hoyle. 90 MW for £198 m; that's £2.2 m/MWh.

As for allegation about not including nuclear decommissioning costs. The figures I quoted for Wylfa A did not include decommissioning; the figures for Wylfa B do. Thanks for 'asking'.